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<h1><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">下载PNG图片：三角形PNG </font></font></h1><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
在此页面中，您可以下载 PNG 图像 -</font></font><strong><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">三角形 PNG</font></font></strong><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">。</font></font><br><br> </div>
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<br><h1><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">具有透明背景的三角形 PNG 图像</font></font></h1>
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<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">此图像具有</font><font style="vertical-align: inherit;">分辨率为</font><b><font style="vertical-align: inherit;">271x313 的</font></b></font><b><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">透明 PNG</font></font></b><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">格式</font><font style="vertical-align: inherit;">。</font><font style="vertical-align: inherit;">您可以</font><font style="vertical-align: inherit;">从此页面以最佳分辨率</font><b><font style="vertical-align: inherit;">下载</font></b><font style="vertical-align: inherit;">此图像，并将其用于设计和网页设计。</font></font><b><font style="vertical-align: inherit;"></font></b><font style="vertical-align: inherit;"></font><br><font style="vertical-align: inherit;"></font><b><font style="vertical-align: inherit;"></font></b><font style="vertical-align: inherit;"></font></p>
<p><b><font style="vertical-align: inherit;"></font></b><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">您可以免费下载具有透明背景的</font><b><font style="vertical-align: inherit;">三角形 PNG</font></b><font style="vertical-align: inherit;">，只需点击并保存。</font></font></p>
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<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
甲</font></font><strong><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">三角形</font></font></strong><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">是具有三个边和三个顶点的多边形。</font><font style="vertical-align: inherit;">它是几何学中的基本形状之一。</font><font style="vertical-align: inherit;">具有顶点 A、B 和 C 的三角形表示为三角形 ABC。
</font></font></p>
<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
在欧几里得几何中，任何三个点，当不共线时，确定一个唯一的三角形，同时确定一个唯一的平面（即二维欧几里得空间）。</font><font style="vertical-align: inherit;">换句话说，只有一个平面包含该三角形，并且每个三角形都包含在某个平面中。</font><font style="vertical-align: inherit;">如果整个几何体只有欧几里得平面，则只有一个平面，所有的三角形都包含在其中；</font><font style="vertical-align: inherit;">然而，在高维欧几里得空间中，这不再是正确的。</font><font style="vertical-align: inherit;">除非另有说明，否则这篇文章是关于欧几里得几何中的三角形，特别是欧几里得平面。
</font></font></p>
<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
三角形被假定为二维平面图形，除非上下文另有规定（参见下面的非平面三角形）。</font><font style="vertical-align: inherit;">在严格的处理中，三角形因此被称为 2-单纯形（另见多面体）。</font><font style="vertical-align: inherit;">公元前 300 年左右，欧几里得在他的《几何学》第 1-4 卷中介绍了关于三角形的基本事实。
</font></font></p>
<p><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
三角形内角的度量总和为 180 度（相同颜色表示它们相等）。
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<p>
The sum of the measures of the interior angles of a triangle in Euclidean space is always 180 degrees. This fact is equivalent to Euclid's parallel postulate. This allows determination of the measure of the third angle of any triangle given the measure of two angles. An exterior angle of a triangle is an angle that is a linear pair (and hence supplementary) to an interior angle. The measure of an exterior angle of a triangle is equal to the sum of the measures of the two interior angles that are not adjacent to it; this is the exterior angle theorem. The sum of the measures of the three exterior angles (one for each vertex) of any triangle is 360 degrees.
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In this page you can download free PNG images: <strong>Triangle PNG images free download</strong>
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<div style="font-size:12px"><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
关键词：三角形 PNG，下载透明背景的 PNG 图像，PNG 图像：三角形 PNG，免费 PNG 图像，三角形</font></font><br><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
图像类别：</font></font><b><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">三角形</font></font></b><br><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
格式：</font></font><strong><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">带有 alpha（透明）的 PNG 图像</font></font></strong><br><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
许可：</font></font><b><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">Creative Commons 4.0 BY-NC</font></font></b> <br><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
分辨率：271x313</font></font><br><font style="vertical-align: inherit;"><font style="vertical-align: inherit;">
尺寸：10千字节</font></font><br>
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